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<t>Dan; sent an example provisional patent for an invention as close to yours as I could find. Please use this as a guide. Labeled drawings are very important with description of parts (numbered, of course), and how they work together is VERY IMPORTANT. I will be happy to critique your drafts, and s...

<t>I feel it necessary to add some additional information. <br/> 1. If you have not yet perfected the engine it might be prudent for you to wait until you are sure your design is workable. Under 35 USC 102(b) of the US Patent laws, you have up to one year to file after you have publically disclosed,...

<t>Sent an answer two days ago; it has not appeared yet. I am registered with US Patent Office (registration number 44,988). Best to file a provisional patent (cost $80). It will give you patent pending status and protection for up to 1 year. Primary requirements: An enabling disclosure- meaning: (1...